Industrial endoscope is a very common tool in many fields. Since the industrial endoscope is designed with special dimensions, it can easily and accurately observe the internal structure or state of the object without damaging the surface of the detected object. Industrial endoscopes are generally used for the inspection of places with high temperature, toxic, nuclear radiation and direct observation of human eyes, mainly used in the fields of automobiles, aero engines, pipelines and mechanical parts. So what is the principle of industrial endoscope?
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　　 Principles of industrial endoscopes
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Transfer lens image technology is used to transmit images, and light transmission illumination is provided by optical fiber. In order to transmit a clear image, the effective stainless steel insertion part of the speculum is designed with a transfer lens system of several optical elements. The built-in optical fiber directly transmits the light to be taken from the independent cold light source to the working position. The image is transmitted to the rake surface of the CCD through the objective lens, and then the CCD converts the light image into an electronic signal, and transmits the data to the video endoscope control group, and then the control group outputs the image to the monitor or computer.
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　　 Factors affecting the inspection of industrial endoscopy
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1. Lighting conditions. Endoscope detection mostly uses the endoscope's own light source for illumination. Under normal conditions, the endoscope is required to detect the color temperature of the illumination light source not less than 5600K and the illumination intensity not less than 2600lm.
2. Probe position and angle. It is usually best to observe the image within the range of 5 ~ 25mm from the detection area , so it is often necessary to endoscope probe as close as possible to the observation point. The probe and the plane of the observation object can achieve a good observation effect in the range of 45 ゜ ~ 90 ゜. In actual work, the position and angle of the probe and the observation point are changed repeatedly to find the appropriate observation position and obtain the best detection. effect.
3. Channel. When selecting a channel, try to be as close as possible to the position to be detected, and select the channel with the shortest length to minimize the number and degree of probe bending ; first consider the channel from top to bottom and from high to low; prefer to choose the wide channel; tooling is recommended , To ensure the correct direction of the probe in the product channel; the method of observation and passing should be used to travel in the channel.
4. Resolution, magnification, and detection of the smallest defects. These are the technical indicators of the endoscope itself, which can directly affect the detection results.
5. Reflectivity of object surface. Different objects have different reflectivity on the surface, which is related to the material of the object and the roughness of the surface. Therefore, the intensity of endoscope illumination should be selected according to the specific situation during actual detection in order to obtain clear and useful results.
The above is the content about the factors and principles that affect the detection of industrial endoscopes. Non-destructive testing requires the use of industrial endoscopes as testing tools, which are professionally designed and produced in order to meet the complex use environments of industrial types. Endoscope detection is a detection technology widely used with the development of endoscope manufacturing technology.
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